FeredFenton法处理石化废水反渗透浓水

96Vol．9No．620156ChineseJournalofEnvironmentalEngineeringJun．2015Fered-Fenton122323*2312311．1000832．1000123．100012Ti、TiＲuO2Fered-Fenton。H2O2、Fe2+、pH。H2O275．0mmol/LFe2+7．5mmol/LpH3．05．1mA/cm2120minTOC198．2mg/L99．6mg/L49．7%BOD5/COD0．110．31。EEMFered-Fenton、66．7%。Fered-FentonX703A1673-9108201506-2653-07TreatmentofreverseosmosisconcentrateofpetrochemicalwastewaterbyFered-FentonprocessFanDongqi12WeiJian23SongYonghui23ZengPing23CuiXiaoyu123XuDongyao11．SchoolofChemicalandEnvironmentalEngineeringChinaUniversityofMiningandTechnologyBeijing100083China2．ScientificandTechnologicalInnovationBaseofUrbanWaterEnvironmentalＲesearchChineseＲesearchAcademyofEnvironmentalSciencesBeijing100012China3．StateKeyLaboratoryofEnvironmentalCriteriaandＲiskAssessmentChineseＲesearchAcademyofEnvironmentalSciencesBeijing100012ChinaAbstractAFered-FentonsystemusingTisheetascathodeandＲuO2/Tiasanodewasestablishedfortreatingreverseosmosisconcentrateofpetrochemicalwastewater．TheeffectsofH2O2andFe2+concentrationin-itialpHandappliedcurrentontreatmentefficiencywereinvestigated．Furthermorethevariationsofbiodegrad-abilityandcharacteristicpollutantswerealsoanalyzed．TheresultsshowedthattheoptimumreactionconditionswereH2O2dosageof75．0mmol/LFe2+dosageof7．5mmol/LinitialpHvalueof3．0andcurrentintensityof5．1mA/cm2．Afterreactionof120mintheTOCconcentrationdecreasedfrom198．2mg/Lto99．6mg/Lcorrespondingtoorganicsmineralizationefficiencyof49．7%．TheorganicpollutantsconcentrationsignificantlydecreasedandthebiodegradabilitywasobviouslyimprovedwiththeBOD5/CODratioincreasingfrom0．11to0．31．Theexcitation-emissionmatrixEEMspectrumanalysisdemonstratedthatthetotalremovalefficiencyoffluorescenceorganicsincludingprotein-likeandfulvicacidssubstancesreached66．7%byFered-Fentontech-niquewhichwasinfavorofimprovementofbiodegradabilityandfurtherbiologicaltreatment．KeywordsreverseosmosisconcentrateＲOCFered-Fentonbiodegradabilityexcitation-emissionma-trixEEM2012ZX07202-0022012ZX07202-005211071032014－12－232015－02－051988—。[e-mail]*[e-mail]·OH。Fenton、、1。Fenton、、2。Fenton、9。Fered-FentonFenton。Fered-FentonFentonH2O2/Fe2+3H2O2Fe2+·OH1。Fered-Fen-tonFentonFe3+Fe2+2FentonFe2+4。Fered-Fenton5Fe2++H2O2→Fe3++·OH+OH－1Fe3++H2O2→Fe2++·HO2+H+2·OH+H2O2→·HO2+H2O3·OH+Fe2+→Fe3++OH－4Fe3++·HO2→Fe2++O2H+5Fe2++·HO2+H+→Fe3+62·HO2→H2O2+O27。、、。、Fenton、、、67。Fered-FentonH2O2、Fe2+、pH。11．1“-”COD、BOD5、TOCNH+4-N580、62、19886mg/LpH6．5。1．21、、。ＲuO2/TiTi10．0cm×6．0cm。400mL2．5cm6．0cm×6．0cm。80．0mmol/LNa2SO41．0mol/LH2SO4pHFeSO4·7H2OH2O21．0mol/LNaOHpH10．030min0．45μm。H2O230%w/w、FeSO4·7H2O、Na2SO4、H2SO4、NaOH。1Fered-FentonFig．1SchematicdiagramofFered-Fentonexperimentalsetup1．3CODCＲ3200CODWTWBOD5NH+4-NUnicoUV-2102cUnicoTOCTOC-LCPHCN200pHDZS-706。F-7000。、10。Ex=200～450nmEm=260～550nm5nmPMT700V2400nm/min。Milli-Q。45626Fered-Fenton1．4、FＲIEEM89。5IIIEx/Em=200～250nm/260～330nmEx/Em=200～250nm/330～380nmIIIIVEx/Em=200～250nm/＞380nmEx/Em=250～450nm/260～380nmVEx/Em=250～450nm/＞380nm。Origin9．0ΦiΦin10Pin。22．1H2O2TOCFe2+7．5mmol/LpH3．05．1mA/cm2H2O2TOC。2。H2O2TOCH2O275．0mmol/LTOCH2O2100．0mmol/L125．0mmol/LTOC51．0%44．5%。H2O2·OHTOC。H2O22H2O2TOCFig．2EffectofH2O2concentrationonTOCremovalefficienciesH2O2Fe2+Fe3+H2O211H2O2·OH·HO12-1423H2O2·OH。H2O275．0mmol/L。2．2Fe2+TOCH2O275．0mmol/LpH3．05．1mA/cm2Fe2+TOC3。3Fe2+2．5mmol/L7．5mmol/LTOC35．5%49．7%。Fe2+10．0mmol/LTOC46．2%。Fered-FentonFe2+H2O2·OHFe2+·OH。Fe2+Fe2+·OH1516·OH。Fe2+17H2O2·OOH818。Fe3++H2O2→Fe2++·OOH+H+83Fe2+TOCFig．3EffectofFe2+concentrationonTOCremovalefficiencies2．3pHTOCH2O275．0mmol/LFe2+7．5mmol/L5．1mA/cm2pHTOC4。Fered-FentonpH3．0TOC49．7%。pH3．055629pHpH014．0·OH2．8V1．9V19·OH。pHH2O220Fe2+FeOH3Fe2O3·OH。pH3．0H+H2O2H3O2+H2O2H2O2Fe2+21。4pHTOCFig．4EffectofinitialpHvalueonTOCremovalefficiencies2．4TOCH2O275．0mmol/LFe2+7．5mmol/LpH3．0TOC5。52．6mA/cm212．8mA/cm2TOC5．1mA/cm2TOC49．7%。12．8mA/cm2TOC41．8%。Fe3+Fe2+Fenton·OHTOC22。H2O2923·OH。H2O2+2H++2e－→2H2O95．1mA/cm2。2．524。BOD5/CODB/C5TOCFig．5EffectofelectriccurrentintensityonTOCremovalefficiencies＜0．32526。COD580mg/L、BOD562mg/LCOD278mg/L、BOD587mg/LB/C0．110．31。Fered-FentonTOC198．2mg/L99．6mg/L49．7%。Fered-Fenton。2．6Fered-FentonH2O275．0mmol/LFe2+7．5mmol/LpH3．05．1mA/cm26。27IIIIII、、IVV。EEM2A、C。AⅢExEm250430nmCVExEm335390nm。120min。65626Fered-Fenton6Fig．6EEMspectraofwastewateratdifferentreactiontimesFＲIEEM5Φin1。1ΦIn、ΦⅡn、ΦⅢn、ΦⅣn、ΦⅤn56．2%、69．4%、67．8%、63．0%、62．3%。Fered-Fenton5。76EEMPin。ⅢPinPin。ⅢⅠ、ⅡⅠ、ⅡⅢ。ⅢPin。Ⅰ、Ⅱ、ⅣVPin。。1Table1Normalizedexcitation-emissionareavolumesofallfluorescenceregionsatdifferenttimesminΦInΦⅡnΦⅢnΦⅣnΦⅤnΦTn079828．7534734．0463248．8243671．963388．01384871．41539933．8262462．4338115．1111940．150844．6803296．03036057．9193531．8298526．799632．447156．0674904．96037872．7154642．1187867．589949．930488．1500820．39037475．3154730．1150483．488175．724992．9455857．412034979．6163604．4149149．290140．123917．2461790．5756297EEMPinFig．7PindistributionsinEEMspectraatdifferenttimes3Fered-FentonH2O275．0mmol/L、Fe2+7．5mmol/L、pH3．05．1mA/cm2120minTOC49．7%COD52．1%66．7%B/C0．110．31。Fered-Fen-ton。1ChoiH．Al-AbedS．Ｒ．DionysiouD．D．etal．TiO2-basedadvancedoxidationnanotechnologiesforwaterpurifi-cat